Water-cooled furnace door frame



. 3, 1963 J. H. REIGHART WATER-COOLED FURNACE DOOR FRAME Original Filed March 7, 1960 INVENTOR.

JmHRezgkark F WJCW ATTORNEYS 3,l HEB? Patented Dec. 3, 1853 3,112,737 WATER-CQGLED FURNACE D033 FRAME June H. Reighart, 1991 Lee Road, (Ileveland, Ohio @riginal application Mar. 7, 1959, Ser. No. 13,056, new Fatent No. 3,il77,366, dated Feb. 19, 1963. Divided and this application May 4, B62, Ser. No. 192,474

2 Claims. t ll. 122-499) The invention relates to furnace door frames, md more particularly to water-cooled door frames especially adapted for use with water-cooled doors of open hearth furnaces, melting furnaces and the like, and the present application is a division of my copending application, Serial No. 13,056, filed March 7, 1960, now Patent No. 3,077,866.

Hollow, water-cooled door frames are commonly used for such furnaces, such door frames comprising generally a hollow steel shell forming an arch with depending hollow legs or jambs communicating therewith, and means for passing cooling water therethrough.

In steel mills generally, river water is circulated through the hollow shell and jambs of such door frames for cooling the same to protect them against the intense furnace heat to which they are subjected. As river water ordinarily contains sand, silt, earth and the like, much of which is so fine that it passes through the filters usually provided for such purpose, considerable difliculty is experienced by admitting the same to the interiors of such hollow door frames.

A major dificulty experienced in steel mill practice is that this fine sand, silt, earth and similar impurities are deposited in a film or layer upon the arch of the door frame, which is subjected to the full intensity of the furnace heat.

This results in this film or layer of earthy substances 7 rendering the door frame useless and requiring immediate-replacement thereof.

Such furnace door frames are sometimes provided with a hollow lintel disposed inwardly toward the interior of the furnace for supporting the skewback channel which supports one end of the furnace roof.

Also, such door frames are sometimes provided with inwardly disposed, hollow jarnb guards on the legs or jambs of the door frame, between which jarnb guards the brick-work of the furnace Wall is built.

in some cases, such furnace door frames are provided with both a hollow lintel and hollow jamb guards, and, since these members frame the door opening on the furnace side of the door frame, it is necessary that these hollow lintels and hollow jamb guards be cooled by the circulation of water therethrough in order to protect them from the furnace heat.

Another difhculty commonly experienced in the use of such water-cooled furnace door frames is the formation of steam pockets which interfere with the flow of Water.

It is, therefore, a primary object of the invention to provide a hollow, water-cooled door frame having means therein for preventing earthy impurities in the circulating water from being deposited upon the arch plate of the door frame and insulating the same against the cooling influence of the water.

Another object of the invention is to provide a door frame of the character referred to having sumps in the lower ends of the hollow legs or jambs thereof and means for delivering the cooling water directly to these sumps so that the greater portion of the earthy impurities in the Water may be deposited therein, after which the water with these impurities removed therefrom is circulated through the hollow shell.

A further object of the invention is to provide such a door frame in which each sump is formed by an angularly inclined partition wall within and spaced from the lower end of each leg or jamb of the frame, the water inlet pipe being located through said partition Wall for deliver ng the incoming water directly into the sump, the Water then rising through an opening at the top of the inclined partition wall and circulating through the hollow door frame to the discharge outlet.

A still further object of the invention is to provide a hollow, water-cooled door frame of the character referred to having a hollow inwardly disposed lintel and means for circulating cooling water through the lintel in a manner to adequately cool the same and protect it from the furnace heat.

Another object of the invention is to provide a furnace door frame of this type having inwardly disposed hollow jamb guards on the legs or jambs thereof and means for circulating cooling water through these jamb guards so as to adet uately cool the same to protect them against the heat of the furnace.

A further object of the invention is to provide a watercooled door frame of this type having a separate circulation system in each jamb guard to prevent accumulation of steam in pockets which would interfere with the flow of water.

It is also an object of the invention to provide such a Water-cooled door frame having a hollow inwardly disposed lintel thereon and hollow inwardly disposed jamb guards upon the legs or jambs thereof and means for circulating cooling water through the hollow lintel and through the hollow jamb guards to adequately cool the same and protect them against the furnace heat.

Another object of the invention is to provide a hollow water-cooled door frame of the character referred to in which the hollow lintel and the hollow jamb guards communicate directly with each other.

Another object of the invention is to provide a watercooled door frame of this type in which spaced bafile walls are provided within the hollow jamb guards so as to direct the flow of cooling water against the innermost portions of the jamb guards.

A further object of the invention is to provide a door frame of this character in which the hollow lintel is separated by a transverse partition wall into two longitudinally aligned halves and each half is separated by a horizontal bafile wall into upper and lower chambers, with means for circulating cooling water therethrough.

These and other objects, apparent from the drawing and following description, may be attained, the abovedescribed difficulties overcome and the advantages and results obtained, by the apparatus, construction, arrangement and combinations, subcombinations and parts which comprise the present invention, a preferred embodiment of which, illustrative of the best mode in which applicant has contemplated applying the principle, being set forth in detail in the following description and illustrated in the accompanying drawing.

in general terms, the invention may be briefly described in its simplest form as comprising a hollow water-cooled furnace door frame comprising a steel shell having depending legs or jambs, an arch plate in the shell forming the bottom of the main body of the door frame and the opposed side walls of the legs or jambs.

An angularly inclined partition wall is located within a the lower portion of each leg or jamb at a point spaced from the bottom thereof providing a sump in the lower end of each hollow leg or jamb. A water inlet pipe enters the hollow shell at one upper corner thereof and communicates with a manifold centrally located therein. Pipes lead from each end of said manifold down into the hollow 7 legs or jambs each pipe passing through the corresponding inclined partition wall and terminating therebelow.

Thus, the incoming water is delivered directly to the sumps in the lower ends of the legs or jambs and earthy impurities in the water may be deposited by gravity therein. The water then passes upward through an opening at the top of each inclined partition wall through the hollow legs or jambs and then through the main body portion of the shell and is discharged through an outlet pipe in the other upper corner of the shell.

A small vent is preferably provided in the lower portion of each inclined partition wall to permit a small amount of water to rise upwardly therethrough, in order to agitate the water in the hollow legs or jambs directly above the inclined partition wall to prevent the deposit of earthy impurities from the water onto the top thereof and to permit such impurities to settle by gravity through said vent into the sump. A clean-out plug is provided in the lower portion of each sump for the purpose of periodically removing any accumulation of sand, silt, earth and the like therefrom.

A hollow jamb guard is disposed inwardly from each leg or jarnb or" the hollow door frame. Each hollow jamb guard communicates with the corresponding leg or jamo of the frame only at the lower and upper ends of the jarnb guard.

The lower end of the jamb guard communicates with the corresponding leg or jamb directly below the upper end of the inclined partition wall. Spaced inclined baffle walls are located within each hollow jamb guard in order to direct the flow of water against the innermost portion of the jamb guard.

In addition to the water-circulating means above described, a second pair of pipes leads from the manifold downward to each hollow leg or jamb terminating above the inclined partition wall therein. If desired, a second sump may be formed in each leg or jamb by locating a second inclined partition wall therein at a point above the first partition wall, the second pipe in each leg extending through this second partition wall and terminating therebelow, and the water rising up from the second sump through an opening at the upper end of the second partition wall and circulating upward through the hollow legs or jambs and then through the main body portion of the hollow door frame to the outlet.

Having thus briefly described the invention, reference is now made to the accompanying drawing, in which:

FIG. 1 is a sectional elevation of a door frame embodying the invention, with communicating hollow, watercooled jamb guards and lintel, looking toward the back or outer side thereof;

FIG. 2 is a vertical section taken on the line 2-2, FIG. 1;

FIG. 3 is a fragmentary vertical sectional view taken on the line 33, FIG. 1; and

FIG. 4 is a horizontal sectional view taken on the line 4-4, FIG. 1.

Referring now to the embodiment of the invention illustrated in the drawing, in which'similar numerals refer to similar parts throughout, the same comprises a hollow water-cooled door frame provided with hollow, vertical,

water-cooled jamb guards and hollow, horizontal, watercooled lintel communicating with each other, showing means of circulating the water therethrough.

The hollow door frame comprises the upper or body portion indicated generally at 1 and the depending hollow legs or jambs indicated generally at 2. The shell is formed of the spaced inner and outer steel plates 3 and '4 respectively, forming the inner and outer walls of the 4 body portion and legs or jamos, the top plate 5, end plates 6, arch plate 7, and bottom plates 3 closing the lower ends of the hollow legs. Spacing bolts or bars h maybe provided for connecting the plates 3 and 4 in spaced relation and conventional doorway guides 19 are provided.

Hollow jamb guards 24 are located on the inner or furnace side of the hollow legs or jambs 2, and the horizontally disposed hollow watercooled lintel 49 comrnunicates at each end with the upper ends of the hollow jarnb guards.

The fluid inlet pipe 11 extends through the top plate at one upper corner of the hollow door frame and is then directed toward the center of the hollow shell where it is connected to the manifold 12.

Pipes 13 are connected to opposite ends of the manifold and directed toward opposite ends of the shell and then downward as at 14 into the hollow legs or jarnbs 2. The lower end of the portion 14 of each of these pipes is located through a suitable opening in the inclined partition wall 15 in the corresponding hollow leg.

As above described, each of these partition walls is inclined upwardly toward the inner wall 3 to which it is connected just above the inlet opening located at the lower end of the corresponding hollow jamb guard 24.

A plurality of inclined bafiie plates 26 are provided within each hollow jamb guard, terminating at points spaced from the vertical wall 27 thereof. The lower wall 28 of each jamb guard is inclined upwardly towardthe vertical wall 27, and the upper end of each hollow jamb guard is connected to the adjacent end of the hollow lintel 49 so that communication is provided therebetween.

At the center of the hollow lintel a transverse partition wall is provided, and on each side thereof aborizontally disposed partition wall 61 extends from each end of the hollow lintel to a point spaced from the central transverse partition 60, thus dividing each half of the hollow lintel into lower and upper chambers 62 and 63 respectively.

An opening 64 is provided in the inner wall 3, at each end of the hollow lintel, providing communication between the upper chambers 63 thereof and the interior of the hollow shell of the door frame.

A second pair of conduits or pipes 65 are connected to the manifold 12 and directed toward opposite ends of the frame and then downward as at '66 into the hollow legs or jambs 2., terminating above the inclined partition walls 15. If desired, a second sump may be formed in each hollow leg or jamb above the inclined partition 15 by providing an inclined partition wall 33 through which the lower end of the conduit 66 extends, openings 34 being formed adjacent the upper ends thereof.

Cleanout plugs may be provided as above described for cleaning out the two sumps in each hollow leg or jamb and also for cleaning the tops of the inclined partitions 33.

Cold water from the inlet pipe 11 is distributed through the manifold 12 to the pipes 13 and down through the vertical extensions l ithereof to the lower sumps 21 in the lower ends of the hollow legs where impurities from the water may be collected. The water then passes through the inlets 25 into the lower ends of the hollow jamb guards 24, around the bathe plates 26 therein and into the ends of the lower chambers 62 in the hollow lintel i l, then from each end toward the center of the hollow lintel and upward between the transverse partition wall 6t: and the ends of the horizontal partition walls 61 into the upper chambers 63 of the lintel and then to opposite ends thereof and through the openings 64 into the interior of the hollow shell.

At the same time, water is distributed from .the mani fold 12 through the pipes 65 and downward through the vertical extensions 65 thereof, into the upper sumps 36 where impurities from the water may be deposited. The water rises from these sumps through the openings 34 and upward through the legs and is circulated through the body portion of the shell and discharged through the outlet pipe 19.

In the foregoing description, certain terms have been used for brevity, clearness and understanding, but no unnecessary limitations are to be implied therefrom beyond the requirements or" the prior art, because such words are used for descriptive purposes and are intended to be broadly construed.

Moreover, the embodiments of the improved construction illustrated and described herein are by way of example, and the scope of the present invention is not lirnite to the exact details of construction.

Having now described the invention or discovery, the construction, the operation, and use of preferred embodiments thereof, and the advantageous new and useful results obtained thereby; the new and useful construction, and reasonable mechanical equivalents thereof obvious to those skilled in the art, are set forth in the appended claims.

I claim:

1. In a hollow, water-cooled furnace door frame of the character described, spaced inner and outer plates having depending extensions at opposite side edges defining in part a hollow shell consisting of a hollow body portion and spaced hollow legs depending therefrom, a top plate closing the top of said hollow body portion, an arch plate closing the bottom of said hollow body portion and the inner sides of the hollow legs, end plates closing the edges of the hollow body and the outer sides of the hollow legs, bottom plates closing the lower ends of the hollow legs, a partition wall within each hollow leg and spaced from the bottom thereof providing a sump in the lower end of each leg, means for circulating a fluid through said shell, said means comprising a fluid inlet pipe extending from an upper corner of the hollow shell to a point adjacent the center of the hollow body portion, conduits extending down into said hollow legs and through the partition walls therein, means providing communication between said inlet pipe and said conduits, hollow vertical water-cooled jamb guards fixed upon the exterior of said inner plates and substantially coextensive with said hollow legs, means providing communication between each sump and the lower end of the corresponding jamb guard, means providing communication between the upper end of each jamb guard and the hollow shell, a hollow horizontal lintel on the exterior of said inner plate, said hollow lintel communicating at its ends with the upper ends of the hollow jamb guards, a transverse partition at the center of the hollow lintel, a horizontal partition extending from each end of the hollow lintel to a point spaced from the transverse partition, means providing communication between each end of the hollow lintel above the corresponding horizontal partition and the interior of the hollow shell, and a iiuid outlet at the other upper corner of the hollow shell.

2. In a hollow, water-cooled furnace door frame of the character described, spaced inner and outer plates having depending extensions at opposite side edges defining in part a hollow shell consisting of a hollow body portion and spaced hollow legs depending therefrom, a top plate closing the top of said hollow body portion, an arch plate closing the bottom of said hollow body portion and the inner sides of the hollow legs, end plates closing the edges of the hollow body and the Outer sides of the hollow legs, bottom plates closing the lower ends of the hollow legs, a partition wall within each hollow leg and spaced from the bottom thereof providing a sump in the lower end of each leg, means for circulating a fluid through said shell, said means comprising a fiuid inlet pipe extending from an upper corner of the hollow shell to a point adjacent the center of the hollow body portion, conduits extending down into said hollow legs and through the partition walls therein, means providing communication between said inlet pipe and said conduits, hollow vertical water-cooled jamb guards fixed upon the exterior of said inner plate and substantially coextensive with said hollow legs, means providing communication between each sump and the lower end of the corresponding jamb guard, means providing communication between the upper end of each jamb guard and the hollow shell, a hollow horizontal lintel on the exterior of said inner plate, said hollow linte-l communicating at its ends with the upper ends of the hollow jamb guards, a transverse partition at the center of the hollow lintel, a horizontal partition extending from each end of the hollow lintel to a point spaced from the transverse partition, means providing communication between each end of the hollow lintel above the corresponding horizontal partition and the interior of the hollow shell, second conduits communicating with said inlet pipe and extending down in said hollow legs to points above the partitions therein, and a fluid outlet at the other upper corner of the hollow shell.

References Cited in the file of this patent UNITED STATES PATENTS 1,211,884 Schmidt Jan. 9', 1917 2,529,272 Yoxall Nov. 7, 1950 2,720,192 Humes Oct. 11, 1955 FOREIGN PATENTS 774,209 Great Britain May 8, 1957 

1. IN A HOLLOW, WATER-COOLED FURNACE DOOR FRAME OF THE CHARACTER DESCRIBED, SPACED INNER AND OUTER PLATES HAVING DEPENDING EXTENSIONS AT OPPOSITE SIDE EDGES DEFINING IN PART A HOLLOW SHELL CONSISTING OF A HOLLOW BODY PORTION AND SPACED HOLLOW LEGS DEPENDING THEREFROM, A TOP PLATE CLOSING THE TOP OF SAID HOLLOW BODY PORTION, AN ARCH PLATE CLOSING THE BOTTOM OF SAID HOLLOW BODY PORTION AND THE INNER SIDES OF THE HOLLOW LEGS, END PLATES CLOSING THE EDGES OF THE HOLLOW BODY AND THE OUTER SIDES OF THE HOLLOW LEGS, BOTTOM PLATES CLOSING THE LOWER ENDS OF THE HOLLOW LEGS, A PARTITION WALL WITHIN EACH HOLLOW LEG AND SPACED FROM THE BOTTOM THEREOF PROVIDING A SUMP IN THE LOWER END OF EACH LEG, MEANS FOR CIRCULATING A FLUID THROUGH SAID SHELL, SAID MEANS COMPRISING A FLUID INLET PIPE EXTENDING FROM AN UPPER CORNER OF THE HOLLOW SHELL TO A POINT ADJACENT THE CENTER OF THE HOLLOW BODY PORTION, CONDUITS EXTENDING DOWN INTO SAID HOLLOW LEGS AND THROUGH THE PARTITION WALLS THEREIN, MEANS PROVIDING COMMUNICATION BETWEEN SAID INLET PIPE AND SAID CONDUITS, HOLLOW VERTICAL WATER-COOLED JAMB GUARDS FIXED UPON THE EXTERIOR OF SAID INNER PLATES AND SUBSTANTIALLY COEXTENSIVE WITH SAID HOLLOW LEGS, MEANS PROVIDING COMMUNICATION BETWEEN EACH SUMP AND THE LOWER END OF THE CORRESPONDING JAMB GUARD, MEANS PROVIDING COMMUNICATION BETWEEN THE UPPER END OF EACH JAMB GUARD AND THE HOLLOW SHELL, A HOLLOW HORIZONTAL LINTEL ON THE EXTERIOR OF SAID INNER PLATE, SAID HOLLOW LINTEL COMMUNICATING AT ITS ENDS WITH THE UPPER ENDS OF THE HOLLOW JAMB GUARDS, A TRANSVERSE PARTITION AT THE CENTER OF THE HOLLOW LINTEL, A HORIZONTAL PARTITION EXTENDING FROM EACH END OF THE HOLLOW LINTEL TO A POINT SPACED FROM THE TRANSVERSE PARTITION, MEANS PROVIDING COMMUNICATION BETWEEN EACH END OF THE HOLLOW LINTEL ABOVE THE CORRESPONDING HORIZONTAL PARTITION AND THE INTERIOR OF THE HOLLOW SHELL, AND A FLUID OUTLET AT THE OTHER UPPER CORNER OF THE HOLLOW SHELL. 